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US 5,205,074 AGranted
Counterbalanced window operators
AssigneeAndersen Corporation
InventorsJames C. Guhl, Jurgen R. Martens, Hartmut Ginnow-Merkert, Harald Tomanek
Life of this patent
Estimating the term…
Abstract
A counterbalanced window operator includes a rotatable drive member operatively connected to the pivoting end of the window by means of an arm member (29). A spring (40) occupying a fixed orientation is operatively connected to the arm member (29) to counterbalance the torque transmitted from the window to the arm member (29). In a preferred embodiment, double scissors arm members (250a and 250b) include a pair of first arm members (251a and 251b) that define a first plane and a pair of second arm members (252a and 252b) that define a second plane at an oblique angle relative to the first plane when the window is in an open position.
Claims23
An operator for a pivoting unit, the unit having a first, pivoted end and a second, rotatable end, the operator comprising:
- (a) a housing;
- (b) a rotatable drive member operatively mounted in said housing, said drive member having an axis of rotation;
- (c) a pair of first arm members having first and second ends, said drive member operatively connected to said first arm members proximate said first ends;
- (d) a pair of second arm members having first and second ends, said first ends of said second arm members operatively connected to said second ends of said first arm members, and said second ends of said second arm members operatively connected to the second, rotatable end of the pivoting unit, wherein a torque from the unit is transmitted to said first and second arm members, wherein the second, rotatable end of the pivoting unit is rotatable from a closed position to an open position, and when the second, rotatable end is in said open position, said first arm members generally define a first plane, and said second arm members generally define a second plane at an oblique angle relative to said first plane;
- (e) rotating drive means for rotating said drive member;
- (f) counterbalancing means, operatively connected to said first arm members, for counterbalancing the torque on said first and second arm members, said counterbalancing means creating a force that is transmitted to said first and second arm members;
- and
- (g) a pair of linking members that operatively connect said first arm members to said drive member so as to provide an over center advantage as the second, rotatable end of the pivoting unit is rotated to said closed position.
5 more elements
An operator for a pivoting unit, the unit having a first, pivoted end and a second, rotatable end, the operator comprising:
- (a) a housing;
- (b) a rotatable drive member operatively mounted in said housing, said drive member having an axis of rotation;
- (c) a pair of first arm members having first and second ends, said drive member operatively connected to said first arm members proximate said first ends said first arm members have a common pivot point;
- (d) a pair of second arm members having first and second ends, said first ends of said second arm members operatively connected to said second ends of said first arm members, and said second ends of said second arm members operatively connected to the second, rotatable end of the pivoting unit, wherein a torque from the unit is transmitted to said first and second arm members, wherein the second, rotatable end of the pivoting unit is rotatable from a closed position to an open position, and when the second, rotatable end is in said open position, said first arm members generally define a first plane, and said second arm members generally define a second plane at an oblique angle relative to said first plane;
- (e) rotating drive means for rotating said drive member;
- and
- (f) counterbalance means, operatively connected to said first arm members, for counterbalancing the torque on said first and second arm members, said counterbalancing means creating a force that is transmitted to said first and second arm members.
4 more elements
A roof window assembly, comprising:
- (a) a frame having a top end and a bottom end;
- (b) a sash having a top end and a bottom end, said sash configured to engage said frame, and said top end of said sash pivotally mounted to said top end of said frame, and said bottom end of said sash being rotatable into and out of engagement with said bottom end of said frame;
- and
- (c) a counterbalanced roof window operator, comprising:
- (i) a housing;
- (ii) a rotatable drive member operatively mounted in said housing, said drive member having an axis of rotation;
- (iii) a pair of first arm member having first and second ends, said drive member operatively connected to said first arm members proximate said first ends;
- (iv) a pair of second arm members having first and second ends, said first ends of said second arm members operatively connected to said second ends of said first arm members, and said second ends of said second arm members individually, pivotally connected to a hinge member on said bottom of said sash, wherein a torque from said sash is transmitted to said first and second arm members.
- (e) rotating drive means for rotating said drive member;
- (f) counterbalancing means, operatively connected to said first arm members, for counterbalancing the torque on said first and second arm members, said counterbalancing means creating a force that is transmitted to said first and second ar members;
- and
- (g) a sash bracket mounted to said bottom end of said sash, and to which said hinge member is rotatably mounted, wherein said sash bracket defines a condensation channel into which condensation may run and collect.
9 more elements
A roof window assembly, comprising:
- (a) a frame having a top end and a bottom end;
- (b) a sash having a top end and a bottom end, said sash configured to engage said frame, and said top end of said sash pivotally mounted to said top end of said frame, and said bottom end of said sash being rotatable into and out of engagement with said bottom end of said frame;
- and
- (c) a counterbalanced roof window operator, comprising:
- (i) a housing;
- (ii) a rotatable drive member operatively mounted in said housing, said drive member having an axis of rotation;
- (iii) a pair of first arm members having first and second ends, said drive member operatively connected to said first arm members proximate said first ends;
- (iv) a pair of second arm members having first and second ends, said first ends of said second arm members operatively connected to said second ends of said first arm members, and said second ends of said second arm members individually, pivotally connected to a hinge member on said bottom of said sash, wherein a torque from said sash is transmitted to said first and second arm members;
- (e) rotating drive means for rotating said drive member;
- (f) counterbalancing means, operatively connected to said first arm members, for counterbalancing the torque on said first and second arm members, said counterbalancing means creating a force that is transmitted to said first and second arm members;
- and
- (g) a pair of linking members that operatively connect said first arm members to said drive member so as to provide an over center advantage as the second, rotatable end of the pivoting unit is rotated to said closed position.
9 more elements
Dependencies are inferred from the claim text.